From the IE Tab Website:

“IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox…

 

This is a great tool for web developers, since you can easily see how your web page displayed in IE with just one click and then switch back to Firefox.”

This addon makes life so much easier because it literally uses the version of Internet Explorer that you have installed in windows, inside the Firefox window, and allows you to switch back and forth. You can also set it to always open certain pages with the IE Tab already on before the page loads.

IE Tab

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